What is Classroom?
Google Classroom is mission control for your classes. As a free service for teachers and students, you can create classes, distribute assignments, send feedback, and see everything in one place. Instant. Paperless. Easy.
Manage teachers and students
Assign teachers to courses, create course rosters, retrieve course lists for users
Add the Classroom share button
Add a Classroom share button to your site to allow teachers and students to easily share content back to their classes